STEEMMONSTERS have changed things up a bit.
Completing a quest last year would have got you cards. The number of cards would depend on on your league rank you would be at the time of claiming prize.
Since then things have changed, now you get loot chests that contain cards potions and DEC.
Today's rewards I received from the chests where the following.
I enjoy this game so much. If you haven't tried it out your missing out